{"id":229204,"date":"2021-08-16T14:02:45","date_gmt":"2021-08-16T12:02:45","guid":{"rendered":"https:\/\/dev22.het-filter.de\/atex-zones-hazardous-area-classification\/"},"modified":"2024-09-05T11:33:26","modified_gmt":"2024-09-05T09:33:26","slug":"atex-zones-hazardous-area-classification","status":"publish","type":"post","link":"https:\/\/het-filter.de\/en\/atex-zones-hazardous-area-classification\/","title":{"rendered":"ATEX Zones &#8211; Hazardous Area Classification"},"content":{"rendered":"\n<p>Potentially explosive atmospheres are divided into corresponding zones \u2013 depending on the frequency and duration of the occurrence of hazardous explosive atmospheres. The system operator is responsible for defining the zone for the operation of the system, while the manufacturer is responsible for defining the zone for the system.\nUltimately, however, the system operator decides on the zoning. <\/p>\n\n<p>This zone classification is based on the European ATEX Directive (Atmosph\u00e8res Explosibles), which defines the requirements for devices and protective systems used in potentially explosive atmospheres.\nThe Atex zones are specifically defined to minimize the risk of explosions and ensure safety standards. <\/p>\n\n<h2 class=\"wp-block-heading h2-blog\" id=\"h-staub-und-gas-ex-zonen\">Dust and gas Ex zones<\/h2>\n\n<p>The basis for the classification into zones is the duration of the presence of the potentially explosive atmosphere: the longer this is present, the more critical the zone becomes. A distinction is made between gas Ex zones and dust Ex zones: gas Ex zones are 0\/1\/2 and dust Ex zones are 20\/21\/22. In terms of classification, they are the same.<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong>Zone 0\/20:<\/strong> An explosive atmosphere occurs <strong>continuously, for long periods<\/strong> or <strong>frequently<\/strong>.<\/li>\n\n\n\n<li><strong>Zone 1\/21:<\/strong> An explosive atmosphere occurs <strong>occasionally<\/strong>during normal operation.<\/li>\n\n\n\n<li><strong>Zone 2\/22:<\/strong> An explosive atmosphere does <strong>not<\/strong> occur or is likely to occur in the <strong>short term<\/strong> during normal operation.<\/li>\n<\/ul>\n\n<figure class=\"wp-block-image size-full\" id=\"img-blog\"><img decoding=\"async\" width=\"600\" height=\"527\" data-src=\"https:\/\/het-filter.de\/wp-content\/uploads\/2022\/10\/blog_atex_zonen_de-34d5f564.png\" alt=\"Atex zones\" class=\"wp-image-210310 lazyload\" data-srcset=\"https:\/\/het-filter.de\/wp-content\/uploads\/2022\/10\/blog_atex_zonen_de-34d5f564.png 600w, https:\/\/het-filter.de\/wp-content\/uploads\/2022\/10\/blog_atex_zonen_de-34d5f564-480x422.png 480w\" data-sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 600px, 100vw\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 600px; --smush-placeholder-aspect-ratio: 600\/527;\" \/><\/figure>\n\n<h2 class=\"wp-block-heading h2-blog\" id=\"h-gerategruppen-und-kategorien\">Device groups and categories<\/h2>\n\n<p>In addition to the division of the areas into Atex zones, there is also a classification of the devices that can be used according to the necessary safety requirements. This classification results from the risk assessment: The manufacturer of devices with a potential ignition source must relate the protective measures for explosion protection to the probability of an explosive atmosphere occurring.<\/p>\n\n<p>The devices are divided into categories that are matched to the three Atex zones.\nCategory 1 devices are suitable for zone 0 (or 20 for dust), category 2 for zone 1 (or 21 for dust) and category 3 for zone 2 (or 22 for dust).\nThis categorization helps to ensure that only suitable and certified devices are used in appropriately classified areas.  <\/p>\n\n<p>For standard equipment, the testing of a type is an accepted method, provided that the equipment remains in its tested form and no modifications are made to the type.\nThis type examination is usually carried out by a notified body, which performs an EU conformity assessment. <\/p>\n\n<p>An individual test is required for all other systems or devices that are not covered by the standard version or that have been modified.\nThis test can be carried out either by a notified body or by a specially trained service technician.\nIt must be checked w<a href=\"https:\/\/het-filter.de\/en\/glossar\/het\/\" target=\"_self\" title=\"\" class=\"encyclopedia\">het<\/a>her the devices and systems meet the specific requirements of the risk assessment and the applicable Atex zones.  <\/p>\n\n<p>According to Directive 2014\/34\/EU (ATEX), the classification is made into the following equipment groups and categories:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Unter die\u00a0<strong>Ger\u00e4tegruppe I<\/strong>\u00a0fallen explosionsgef\u00e4hrdete Bereiche unter Tage. Die Gef\u00e4hrdung entsteht durch Grubengas und\/oder Staub. Darunter fallen die Kategorien M1 und M2:\n<ul class=\"wp-block-list\">\n<li>The M1 category testifies to a very high level of safety, even when two independent faults occur.<\/li>\n\n\n\n<li>The M2 category testifies to a high level of safety. The devices switch themselves off when explosive atmospheres occur.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n<ul class=\"wp-block-list\">\n<li>Unter die\u00a0<strong>Ger\u00e4tegruppe II<\/strong>\u00a0fallen explosionsgef\u00e4hrdete Bereiche \u00fcber Tage. Die Gef\u00e4hrdung entsteht durch Fl\u00fcssigkeiten oder Gase. Darunter fallen die Ger\u00e4tekategorien 1,2 und 3:\n<ul class=\"wp-block-list\">\n<li>Device category 1 indicates a very high level of safety.<br>The degree of protection is very high for rare faults and when two independent faults occur.<\/li>\n\n\n\n<li>Device category 2 indicates a high degree of safety.<br>The degree of protection is high in the event of an expected malfunction and fault.<\/li>\n\n\n\n<li>Device category 3 indicates an increased level of safety.<br>The degree of protection is normal in normal operation.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n<ul class=\"wp-block-list\">\n<li><strong>Equipment group III<\/strong> covers potentially explosive atmospheres above ground. The hazard arises from finely dispersed solids (dust).<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading h2-blog\" id=\"h-zuordnung-der-geratekategorien-zu-den-ex-zonen\">Assignment of the device categories to the Ex zones<\/h2>\n\n<div style=\"height:35px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<table id=\"tablepress-3\" class=\"tablepress tablepress-id-3 tbody-has-connected-cells\">\n<thead>\n<tr class=\"row-1\">\n\t<th class=\"column-1\"><br \/>\nbrennbares<br \/>\nMedium<\/th><th class=\"column-2\">Dauer des<br \/>\nVorhandenseins<br \/>\nexplosionsf\u00e4higer<br \/>\nAtmosph\u00e4re<\/th><th class=\"column-3\">Ex-Zone<\/th><th class=\"column-4\">Explosionsgruppe<\/th><th colspan=\"3\" class=\"column-5\">Ger\u00e4tekategorie<\/th>\n<\/tr>\n<\/thead>\n<tbody class=\"row-striping\">\n<tr class=\"row-2\">\n\t<td rowspan=\"3\" class=\"column-1\">Gase, D\u00e4mpfe,<br \/>\nNebeln (G)<\/td><td class=\"column-2\">st\u00e4ndig, dauernd<\/td><td class=\"column-3\">Zone 0<\/td><td class=\"column-4\">II<\/td><td rowspan=\"3\" class=\"column-5\">1G<\/td><td class=\"column-6\"><\/td><td class=\"column-7\"><\/td>\n<\/tr>\n<tr class=\"row-3\">\n\t<td class=\"column-2\">gelegentlich<\/td><td class=\"column-3\">Zone 1<\/td><td class=\"column-4\">II<\/td><td rowspan=\"2\" class=\"column-6\">2G<\/td><td class=\"column-7\"><\/td>\n<\/tr>\n<tr class=\"row-4\">\n\t<td class=\"column-2\">selten<\/td><td class=\"column-3\">Zone 2<\/td><td class=\"column-4\">II<\/td><td class=\"column-7\">3G<\/td>\n<\/tr>\n<tr class=\"row-5\">\n\t<td rowspan=\"3\" class=\"column-1\">Staub (D)<\/td><td class=\"column-2\">st\u00e4ndig, dauernd<\/td><td class=\"column-3\">Zone 20<\/td><td class=\"column-4\">II<\/td><td class=\"column-5\">1D<\/td><td class=\"column-6\"><\/td><td class=\"column-7\"><\/td>\n<\/tr>\n<tr class=\"row-6\">\n\t<td class=\"column-2\">gelegentlich<\/td><td class=\"column-3\">Zone 21<\/td><td class=\"column-4\">II<\/td><td class=\"column-5\"><\/td><td rowspan=\"2\" class=\"column-6\">2D<\/td><td class=\"column-7\"><\/td>\n<\/tr>\n<tr class=\"row-7\">\n\t<td class=\"column-2\">selten<\/td><td class=\"column-3\">Zone 22<\/td><td class=\"column-4\">II<\/td><td class=\"column-5\"><\/td><td class=\"column-7\">3D<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<!-- #tablepress-3 from cache -->\n\n<h2 class=\"wp-block-heading h2-blog\" id=\"h-kennzeichnungen-von-entstaubungsanlagen\">Dust collector markings<\/h2>\n\n<p>The marking of dust extraction systems subject to 2014\/34\/EU is carried out<br>in accordance with EN 80079-36. The marking of a dust extractor in an explosive atmosphere or in operation with explosive dusts or gases must be clearly and indelibly placed on the system, e.g. in the form of a type plate. The labeling must include the following information:<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong>CE marking<\/strong>, <strong>number of<\/strong> the notified body and the EX mark<\/li>\n\n\n\n<li><strong>Group<\/strong> and the <strong>device category<\/strong> within the meaning of the 2014\/34\/EU<\/li>\n\n\n\n<li><strong>Protection principle<\/strong>, e.g. Exh=constructive safety<\/li>\n<\/ul>\n\n<ul class=\"wp-block-list\">\n<li><strong>Gas<\/strong>\u2013 bzw.\u00a0<strong>Staubgruppe<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Gas group <strong>IIB<\/strong> contains groups <strong>IIB<\/strong> and <strong>IIA<\/strong>, but not <strong>IIC<\/strong>.<\/li>\n\n\n\n<li>Dust group <strong>IIIA<\/strong> defines combustible lint, dust group <strong>IIIB<\/strong> non-<br>conductive dusts and dust group <strong>IIIC<\/strong> conductive dusts<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n<ul class=\"wp-block-list\">\n<li><strong>Temperature range<\/strong> in which the equipment may be used. The definition is made via the process temperature.\n<ul class=\"wp-block-list\">\n<li>Class: perm. Surface temperature \/ max. Process temperature<br><strong>T1<\/strong>: 450\u00b0C\/360\u00b0C ; <strong>T2<\/strong>: 300\u00b0C\/240\u00b0C ; <strong>T3<\/strong>: 200\u00b0C\/ 160\u00b0C ;<br><strong>T4<\/strong>: 135\u00b0C\/108\u00b0C ; <strong>T5<\/strong>: 100\u00b0C\/80 \u00b0C ; <strong>T6<\/strong>: 85\u00b0C\/68\u00b0C<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n<ul class=\"wp-block-list\">\n<li><strong>Device protection level<\/strong>: indication of the device protection level required for the device category.\n<ul class=\"wp-block-list\">\n<li>Zone 2 or 22 : Avoidance of ignition sources in normal operation.<br>Marking: <strong>Gc<\/strong> or <strong>Dc<\/strong>.<\/li>\n\n\n\n<li>Zone 1 or 21: Avoidance of ignition sources even in the event of normal operating faults.<br>Marking: <strong>Gb<\/strong> or <strong>Db<\/strong>.<\/li>\n\n\n\n<li>Zone 0 or Zone 20: Avoidance of ignition sources even in the event of rare operating faults.<br>Marking: <strong>Ga<\/strong> or <strong>Da<\/strong>.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n<ul class=\"wp-block-list\">\n<li>Field for <strong>acceptances<\/strong> (if not used, then \u201c\/\u201d)<\/li>\n<\/ul>\n\n<ul class=\"wp-block-list\">\n<li><strong>Einsatzbereich<\/strong>\u00a0des Ger\u00e4ts\n<ul class=\"wp-block-list\">\n<li><strong>\u2013<\/strong>: the device can be used without restriction.<\/li>\n\n\n\n<li><strong>X<\/strong>: there are specific operating conditions that must be described in more detail in the documentation<br>.<\/li>\n\n\n\n<li><strong>U<\/strong>: incomplete machine, without CE marking<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n<div style=\"height:59px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<p>The marking must be indicated separately for dust Ex as well as gas Ex. This means that for hybrid mixtures, two labels must be present on the equipment.<\/p>\n\n<p>An <strong>example labeling for dust collection equipment<\/strong> may look like this:<\/p>\n\n<table id=\"tablepress-4\" class=\"tablepress tablepress-id-4\">\n<tbody class=\"row-striping row-hover\">\n<tr class=\"row-1\">\n\t<td class=\"column-1\">Gase\/D\u00e4mpfe:<\/td><td class=\"column-2\">CE 0588<\/td><td class=\"column-3\"><img decoding=\"async\" data-src=\"https:\/\/het-filter.de\/wp-content\/uploads\/2022\/10\/blog_atex_symbol.png\" alt=\"\" width=\"81\" height=\"90\" data-sitemapexclude=\"true\" class=\"alignnone size-full wp-image-210368 lazyload\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 81px; --smush-placeholder-aspect-ratio: 81\/90;\" \/><\/td><td class=\"column-4\">II 2\/-G<\/td><td class=\"column-5\">Exh<\/td><td class=\"column-6\">IIB<\/td><td class=\"column-7\">T6...T5<\/td><td class=\"column-8\">Gb \/<\/td><td class=\"column-9\">-<\/td>\n<\/tr>\n<tr class=\"row-2\">\n\t<td class=\"column-1\">Staub:<\/td><td class=\"column-2\">CE 0588<\/td><td class=\"column-3\"><img decoding=\"async\" data-src=\"https:\/\/het-filter.de\/wp-content\/uploads\/2022\/10\/blog_atex_symbol.png\" alt=\"\" width=\"81\" height=\"90\" data-sitemapexclude=\"true\" class=\"alignnone size-full wp-image-210368 lazyload\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 81px; --smush-placeholder-aspect-ratio: 81\/90;\" \/><\/td><td class=\"column-4\">II 2\/-D<\/td><td class=\"column-5\">Exh<\/td><td class=\"column-6\">IIIA<\/td><td class=\"column-7\">T85\u00b0...T100\u00b0C<\/td><td class=\"column-8\">Db \/\t<\/td><td class=\"column-9\">-<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<!-- #tablepress-4 from cache -->\n\n<h2 class=\"wp-block-heading h2-blog\" id=\"h-fazit\">Conclusion<\/h2>\n\n<p>The classification of the hazard and the division into device categories according to the Atex zones means that different safety concepts are required for the devices and systems used.\nThese safety concepts are essential to ensure the protection of people and the environment in potentially explosive atmospheres.\nThe specific requirements for devices and protective systems are defined in the relevant European standards, which are in line with the ATEX directive.  <\/p>\n\n<p>Knowledge of the processes and substances used is essential in order to carry out an appropriate risk assessment and the correct zoning and equipment categorization.\nEvery device used in an Atex zone must be specially designed and certified for use in this zone.\nThe devices are divided into three main categories corresponding to Atex zones 0\/20, 1\/21 and 2\/22, with category 1 meeting the highest safety requirements.  <\/p>\n","protected":false},"excerpt":{"rendered":"<p>Potentially explosive atmospheres are divided into corresponding zones &#8211; depending on the frequency and duration of the occurrence of hazardous explosive atmospheres. The system operator is responsible for defining the zone for the operation of the system, while the manufacturer is responsible for defining the zone for the system. Ultimately, however, the system operator decides [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":228815,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[28],"tags":[],"class_list":["post-229204","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-explosion-protection"],"_links":{"self":[{"href":"https:\/\/het-filter.de\/en\/wp-json\/wp\/v2\/posts\/229204","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/het-filter.de\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/het-filter.de\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/het-filter.de\/en\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/het-filter.de\/en\/wp-json\/wp\/v2\/comments?post=229204"}],"version-history":[{"count":0,"href":"https:\/\/het-filter.de\/en\/wp-json\/wp\/v2\/posts\/229204\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/het-filter.de\/en\/wp-json\/wp\/v2\/media\/228815"}],"wp:attachment":[{"href":"https:\/\/het-filter.de\/en\/wp-json\/wp\/v2\/media?parent=229204"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/het-filter.de\/en\/wp-json\/wp\/v2\/categories?post=229204"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/het-filter.de\/en\/wp-json\/wp\/v2\/tags?post=229204"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}